Dmitri began acting at the age of four, performing primarily in commercials. The one exception was a small role in the short film "Livewire" because he knew someone starring in it, the producer saw him, and thought he'd be perfect for the role.

When he was seven, he made his feature film debut in the movie "Step Brothers" with Will Ferrell, Adam Scott and John C. Reilly. The part was a small one, but it was a particularly touching scene.